2023 SDSS-V Collaboration Meeting

Session

Session 8

Aug 2, 2023, 11:00 AM

Gerald D. Fischbach Auditorium/2-GDFA (160 5th Avenue)

Conveners

Session 8

• Mike Eracleous

52. Quasar accretion disc variability using the Black Hole Mapper (BHM) multi-epoch data

Santiago Bernal (REMOTE)

8/2/23, 11:00 AM

We study the evolution of the accretion disk spectrum with flux, using data from the time-domain Sloan Digital Sky Survey (SDSS-V) project for 220 quasars at z<0.8. We subtract the host contribution consistently between epochs and model the disk, BLR continua and emission lines simultaneously using the Penalized Pixel Fitting (pPXF) software. We find, even at long wavelengths, that the...

50. Mapping the Gas Kinematics Around Luminous Quasars with BHM-RM

Logan Fries

8/2/23, 11:12 AM

Reverberation mapping has been successful in measuring the masses of quasars under the assumption that the gas in the broad-line region (BLR) is moving in orbits dominated by gravity. Within the last two decades, velocity-resolved reverberation mapping has unveiled a diversity of non-virial kinematics in the BLR of quasars, putting pressure on the enterprise of black hole mass estimation. This...

51. A Structure Function for Variability of $H\beta$ Radial Velocity of SDSS Quasars

Collin Dabbieri

8/2/23, 11:24 AM

Spectroscopic searches for Supermassive Black Hole Binaries (SMBHBs) aim to find quasars with broad emission lines whose velocity offsets show sinusoidal variation over periods of years to decades. This is thought to be an indicator of orbital motion in the case where one SMBH in the binary is actively accreting. One of the predominant limitations to this study is that single black hole...

54. Spectral Subtype Classification and Activity Identification of Low-Mass Stars in SDSS-V

Emma Galligan

8/2/23, 11:38 AM

We use improved, empirical late K and M dwarf spectral templates to more accurately determine spectral subtypes and metallicity classes for all stars in the IPL-2 release. These templates are used in the MDwarfType pipeline to spectroscopically classify low-mass stars. Chromospheric activity in low-mass stars (late K and M dwarfs) is typically associated with youth. To test this hypothesis, we...

53. TBD

Alexandre Roman-Lopes